Furnace-grate.



PATENTED JUNE 19, 1906.

A. COTTON'. PURNAGE GRATE.

APPLIUATION FILED sEPT,z1,19o5.

' 2 SHEETS-SHEET Z.

"Wz'zvesss: -I

gli; lvzwfefzal yl t 'l zo Fig.l '7, a detail transverseisectional'*viewk 1v vention will `appear hereinafter.- A

f. more ful y hereinafter described.

' fk S'-FAT'EEFS'V ALFRED corroiv, OFINEWARKNEW JERSEYv t y j yininNAo-f@fria/rrr. i t f, .t

4 l j specifi-cati@ @freut-ers' rarest.

yAppraisalineaseparaban,1905. `strain. avesse.,y

.resented .Time 19', ib'o.

'To azz amm, it my mami," 'o Be it known that I, VALFRED COTTON, a subject of the King of Great Britain, residing at NeWark,-in the county .of Essex and State lof lNew J ersey", have invented certain new and useful Improvements in Furnace-Grates, of

, which thefollowing isa speoiiicatiomreference beinghad thereinto the'aocompanying 1 5 1 ,-Fig. l6,; spacing-washers being inserted ybe-y tweenthe grate-bars Fig. 4, a side elevation drawings, in which-f .i I e Y Figure 1 isa longitudinal vsectional @view showing my improved* rate in position under a boiler; Fig. 2, ap an view of aportion of the grate Fig. 3, a transverse vertical sectional view of severalgrate-bars interlocked,

Vtaken yapproximately onthel Aline j III III,l of

of one grate-bar Fig. 5, a lhorizontal. sec,- tional view on'the line V Vof Fig 4; Fig. 6, ,a d'etailplan view of a portionof the grate, and

f or coke breezel and .house refuse, in conjunc- .tion with forced draft.,

.Oneof the many objects of this invention is to provide a grate made upof, a series of small.V grate-bars which are loosely interlocked in such manner' that no one grate-bar or set of grate-bars can be-lifted independently of the other grate-bars; y

Many other importantobjects Iof'y the kinx; Referring to the various parts by reference characters, lfdesignates 'the front bearer .or

f Ybearersaredoublethat is they are formed -of two parallel transverse bars arranged comsupport ,2 the rear bearer, and 3a the intermediate bearers. vThese bearers eXtendtransversely of the ash-pit, and the intermediate paratively close togethenfso as to lsupport the adjoinin i ends of the gratebars-as will be *The* end ranks are each composed of long andvrshort bars 3 and 4, respectively, arranged 'alternately side byV side. The forward ends of the bars in the front rank' are arranged on the same transverse line, 'sothat thel rear ends 'of sald bars terminate 'on' different ylines-e-` grate con# Y .that` the rear ends lof the long bars project rearward beyond the endsv of the short ybars. The rear ran/kof vbars is composed also of long andv short'bars, and' the rear 'ends of these bars are arran ed onl the same line, so that T,reirEnr, Orinon.,Ar I

the forward en s4 of the bars'. of this rear rank x terminate on different lines.V 'Theforward ends y y of the lon 'er bars therefore extend` beyond 1" the ends o the shorter bars.- The' short bars vof the rear rankare arranged in the samelongitudinal lines .as the longy barsof the front rank. The intermediate bars 5 are all ofthe same length'.v One longitudinal line orfil'e ofbars will consist of one ,long .bar 'in the frontrank, one intermediate bar,`v andgone shortbar in-therear ranlg'theadjoinin'g line or li-nes or file` or files of bars consisting lof a short bar in the,y front ranlgan intermediate j bar, and along bar in therearrank, as shown clearly in Fig. 2 ofthe drawings By, this Varrangement of the bars there is no' continubreaking j oints.-

V Inmany of the grates heretofore construct` ed of a series ofl ranks of bars a continuous lousftransverse line of division between the ranks of thev.bars,the bars in alternate files transverse space was formed between the ad- Y joining` ends of the bars of the ranks. This transverse sp ace is very objectionable in that the small fuel drops ythrough it and the firingtools frequently are caught in it..

distribution of the draft kthroughout r'the grate.

A- further objection is that these continuous transverse lEach bar `is provided near eachof its ends with two J laterallyextending. horizontal bosses Gand 6EL on one of'its sides and withl an outward-extending horizontalk ange 7 on its other side, theupper surface of said flange n being flush with the up er surface of the grate-bar, as shown clear y in Figs. 3 and?. At a point in the same transverse lane with roo each of the end bosses 6 and slig tly below them@ and on thev o`v posite side of the gratebar are formed the orizontal ribs 8 ,said ribs being spaced below the flange .7 a distance slightly larger than the vertical diameter of the bosses 6, as'shown'clearly in Fig. 7.

Each bar is also formed with horizontal lugs f f 9 on the op osite side of the kbar from the bosses 6a an at a distance beloWthe ilange -7 sli htlyv larger than the vertical diameter o'f .the osses 6a, the lugs 9 bei-ng'Y in theI same transverse plane with the bosses @aand the IIO same horizontal plane with the end ribs 8. The flangev 7 directly above the lugs 9 is formed with lateral horizontal enlargements 10. The said flange at its ends is formed With the lateral enlargements 11, which are connected to the outer ends of the ribs 8, and thereby close the outer ends of the cavities formedvbetween the flange 7 and the said ribs.y The enlargements Y10 and 11, the rib 8, and the lug 9 all terminate in the same longitudinal vertical plane, as shown clearly in Figs. 3 and 7. Each bar is formed with a vertical rib 12 midway between its ends, said rib extending from the top of the flange 7 to the base of the bar, its outer face being in the same longitudinal vertical plane as the ends of the lugs 9 and ribs 8, as shown clearly in Fig. 5 of the drawings.

In assembling the bars the boss 6a of one long bar 8 of the end rank will enter the cavity or s ace between the rib 8 and flange 7 at the en ar ement 11 of one adjoining short bar 4 of t e same rank, and the boss 6 will enter the space between the rib 8 and the flange 7 at the enlargement 11 of one of the adjoining bars 5 of the intermediate rank, as shown very clearly in Fig. 6. The bosses 6 of the short bars 4 of the end rank extend under the flange 7 just below the enlargements 10 and above the lugs 9 of the adjoining long bars 3, as shown in Fig. 6, while the bosses 6EL extend under the flange 7 of said adjoining lon bar 3. The bosses 6 on alternate bars 5 o the intermediate rank extend between the ribs 8 and the flanges 7 directly below the enlargements 11 of the long bars 3 of the end rank, the bosses 6a of said intermediate bars extendin into the adjoining intermediate bars direct y below the enlargements 11 and above the ribs 8. The bosses 6a of the intervening bars of the intermediate or middle rank extend below the flange 7 of the adjoining intermediate bars, the end boss 6 of each of said bars fitting between the enlargement 10 and the lug 9 on the adjoining y bar 5. By this arrangement it will be noted that the long bars of the end ranks are each locked to the adjoining short bars of the same rankV and to one bar of the intermediate or middle rank. The next adjoining short bars of the endranks are locked, by means of their bosses 6 and 6a, to the adjoining longer bars of the end ranks. Alternate bars of the intermediate or middle rank are locked to the long bars of the end ranks, the front ends of one set of bars being locked to the long bars ofthe first or front rank, the other ends of "said bars being locked to adjoining bars of the intermediate or middle rank, and the intervening bars of the middle rank are locked at their rear ends to the long bars of the rear rank, the other ends of said bars being locked to the adjoining bars which are in turn secured at their forward ends to the front rank. From this arrangement it will be noted that the entire grate is loosely interlocked and that no bar can be vertically moved (except to a very slight extent by reason of the play between the bosses and the confining ribs and lugs) independent of the other bars of the grate. It will also be noted that the bars individually or in ranks or files will be incapable of endwise movement on the bearers, except, of course, through the spaces which must necessarily be left between the bars to admit of expansion and contraction.

The enlargements 10 and 11 and ribs 12 of one bar bear against the face of the adjoining bar to provide the longitudinal airspaces between the bars.

Whenever it may be desired to form large air-spaces between the bars, washers 13 may be placed over the bosses 6 and in position to rest against the adjoining lugs 9 and enlargements 10, as shown in Fig. 3, in order to space the bars apart transversely.

It will of course be understood that the cavities in the sides of the grate-bars to receive the bosses of the adjoining bars may be made in any suitable manner and of any suitable shape. The method of forming these cavities described herein I considered a good method to be followed in practice, as it is practicable to cast the bars in the form shown. It will also be understood that some of the bars need only one boss at one of their ends; but I prefer to cast the bars with two bosses at each end in order to simplify the process of manufacture, as fewer molds and patterns need be used. The

bosses 6 and 6 form means for interlocking the adjoining ends of the bars, and, as shown, these interlocking means are integral with the grate-bars.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A grate consisting of a plurality of files each file being formed of a series of gratebars arranged end to end in such manner as to break joints with bars in adjoining files, and means for interlocking the overlapped ends of said grate-bars against independent vertical movement.

2. A grate formed of a series of grate-bars arranged in longitudinal files or lines and in transverse ranks, the bars in one file breaking joints with the bars in adjoining files, means for loosely interlocking the overlapped ends of adjoining bars, and means for loosely interlocking against independent vertical movement the outer ends of the bars of the end ranks.

3. A grate composed of a series of gratebars arranged in longitudinal files or lines and transverse ranks or groups, the bars of the intermediate rank or ranks overlapping some of the bars of the end ranks and means for interlocking the overlapped ends of the bars of one rank with the bars of the adjoin- IOO IIC

'end ranks which are not overlapped with those that are overlapped.

4. A furnace-grate composed of a series -of grate-bars arranged in ranks and files,

means formed integral with each bar for loosely interlocking it with the adjoining bars of the same rank a ainst vertical and endwise movement an Jfor interlocking some of the bars of One rank with the adjoining bars of the neXt rank, whereby the ranks will be interlocked against independent endwise or vertical movement.

5. A furnace-gratecomposed of a series of grate-bars arranged in ranks and les the end ranks being formed of long and short bars, the long bars extending inward beyond the ends of the short bars, and an intermediate or middle rank composed of bars of equal length, means on the long bars of the end ranks for loosely interlocking said bars with the adjoining bars of the intermediate rank and means on the adjoining short bars of the end ranks, and `the bars of the'intermediate rank to loosely interlock said bars with the long bars of the end ranks and the adjoining bars of said intermediate rank. 6. A grate formed of a series of bars arranged in files and ranksjthe bars in the files being arranged end to end and the bars in the ranks being so arranged that the bars of one ile will break joints with the bars in the adjoining files, means for interlocking the ends of said bars against independent vertical movement.

7. A grate formed of a series of bars arranged n iles and ranks, the bars in the files being arranged end to end and the bars in the ranks being so arranged that the bars of one file will break joints with the bars in the adjoining files, means integral with the bars and projecting from the sides thereof to interlock said bars against independent vertical movement'.

8. A grate formed of a series of bars arranged in files' and ranks7 the bars in the iles being arranged end to end and the bars in the ranks being so arranged that the bars of one ile will break joints with the bars in the adjoining iles, and means for interlocking the bar which breaks the joints between the bars of adjoining iiles to the four adjoining bars.

9. A grate formed of a series of bars arranged in files and ranks, the bars inthe iles being arranged end to end and the bars in the ranks being so arranged that the bars of one iile will break joints with the bars in the adjoining iiles, each bar being provided on one side and near each of its ends with a pair of horizontal laterally-extending bosses 6 and 68L and on its other side near each of its ends with the rib 8 and an enlargement 11 and with the rib 9 and an enlargement 10, the rib 8 and enlargement 11 being in the same transverse plane with the bosses 6 and the rib 9 and the enlargements 10 being in the same transverse plane with the bosses 6, said ribs and enlargements being separated from each other vertically a distance substantially equal to the diameter of the adjoining boss 6 or 6a.

In testimony whereof I hereunto afl-lx my signature, in the presence of two witnesses,

this 17th day of June, 1905.

- ALFRED COTTON.

Witnesses:

W. H. RUBY, WM. R. DAvrs. 

